
<template>
	<view>
		<zj-ss></zj-ss>
		<view class="scroll-view-container">
			<!-- 左侧滑动区域 -->
			<scroll-view scroll-y="true" :style="{height:wh + 'px'}" class="left-scroll">
				
				<block v-for="(item,i) in cateList" :key="i" >
					<view :class="['scroll-left-item',i === active ? 'active' : '']" @click="activeChange(i)">{{item.cat_name}}</view>
				</block>
			</scroll-view>
			<!-- 右侧滑动区域 -->
			<scroll-view scroll-y="true" :style="{height:wh + 'px'}" class="right-scroll" :scroll-top="scrollTop">
				<view class="scroll-right-img" v-for="(item2,i2) in cateL2" :key="i2">
					<view class="scroll-right-item">/ {{item2.cat_name}} /</view>
					<view class="cate-lv3-list" >
						<view class="cate-lv3" v-for="(item3,i3) in item2.children" :key="i3" @click="gotogoods(item3)">
							<image :src="item3.cat_icon"></image>
							<text class="cate-lv3-text">{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	
	export default {
		data() {
			return {
				wh: 0,
				cateList:[],
				active : 0,
				cateL2:[],
				scrollTop: 0,
			};
		},
		onLoad() {
			const sys = uni.getSystemInfoSync()
			this.wh = sys.windowHeight
			this.getCateList()
		},
		methods:{
			async getCateList(){
				const {data: res} =await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status != 200) return uni.$showMsg('请求失败')
				this.cateList = res.message
				this.cateL2 =res.message[0].children
			},
			activeChange(i){
				this.active = i
				this.cateL2 = this.cateList[i].children
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			gotogoods(item3){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid=' + item3.cat_id
				})
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	display: flex;
}
.left-scroll{
	width: 100px;
}
.scroll-left-item{
	background: #F7F7F7;
	line-height: 60px;
	text-align: center;
	font-size: 12px;
	&.active{
		background-color: #FFFFFF;
		position: relative;
		&::before{
			background-color: #c00;
			content: '';
			display: block;
			width: 3px;
			height: 30px;
			top: 25%;
			left: 0;
			position: absolute;
		}
	}	
}
.scroll-right-item{
	font-size: 12px;
	font-weight: bold;
	text-align: center;
	padding: 15px 0;
}
.cate-lv3-list{
	display: flex;
	flex-wrap: wrap;
	.cate-lv3{
		width: 33%;
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: center;
	image{
		width: 60px;
		height: 60px;
	}
	text{
		font-size: 12px;
	}
	}
}
</style>
